I think Barack Obama's vehement opposition to Netanyahu speaking before Congress had to leave a lot of people scratching their heads, wondering why such a big deal? Israel, is, after all, our close ally, right? The only democratic government in the Middle East, no? Surely, the Prime Minister of Israel, a friend of the U.S., should be welcome to speak before Congress.

Indeed, Netanyahu's speech drove a nail into Obama's foreign policy coffin. Here are some of the best quotes from his speech:

America and Israel, we share a common destiny, the destiny of promised lands that cherish freedom and offer hope.

For those who believe that Iran threatens the Jewish state, but not the Jewish people, listen to Hassan Nasrallah, the leader of Hezbollah, Iran's chief terrorist proxy. He said: If all the Jews gather in Israel, it will save us the trouble of chasing them down around the world.

Iran's regime is not merely a Jewish problem, any more than the Nazi regime was merely a Jewish problem. The 6 million Jews murdered by the Nazis were but a fraction of the 60 million people killed in World War II. So, too, Iran's regime poses a grave threat, not only to Israel, but also the peace of the entire world.

America's founding document promises life, liberty and the pursuit of happiness. Iran's founding document pledges death, tyranny, and the pursuit of jihad. And as states are collapsing across the Middle East, Iran is charging into the void to do just that. Iran's goons in Gaza, its lackeys in Lebanon, its revolutionary guards on the Golan Heights are clutching Israel with three tentacles of terror. Backed by Iran, Assad is slaughtering Syrians. Back by Iran, Shiite militias are rampaging through Iraq. Back by Iran, Houthis are seizing control of Yemen, threatening the strategic straits at the mouth of the Red Sea. Along with the Straits of Hormuz, that would give Iran a second choke-point on the world's oil supply.

Iran's regime is as radical as ever, its cries of "Death to America,'' that same America that it calls the "Great Satan,'' as loud as ever. Now, this shouldn't be surprising, because the ideology of Iran's revolutionary regime is deeply rooted in militant Islam, and that's why this regime will always be an enemy of America. Don't be fooled. The battle between Iran and ISIS doesn't turn Iran into a friend of America. Iran and ISIS are competing for the crown of militant Islam. One calls itself the Islamic Republic. The other calls itself the Islamic State. Both want to impose a militant Islamic empire first on the region and then on the entire world. They just disagree among themselves who will be the ruler of that empire. In this deadly game of thrones, there's no place for America or for Israel, no peace for Christians, Jews or Muslims who don't share the Islamist medieval creed, no rights for women, no freedom for anyone. So when it comes to Iran and ISIS, the enemy of your enemy is your enemy. The difference is that ISIS is armed with butcher knives, captured weapons and YouTube, whereas Iran could soon be armed with intercontinental ballistic missiles and nuclear bombs.

The greatest dangers facing our world is the marriage of militant Islam with nuclear weapons. To defeat ISIS and let Iran get nuclear weapons would be to win the battle, but lose the war. But that, my friends, is exactly what could happen, if the deal now being negotiated is accepted by Iran. That deal will not prevent Iran from developing nuclear weapons. It would all but guarantee that Iran gets those weapons, lots of them.

Iran not only defies inspectors, it also plays a pretty good game of hide-and-cheat with them. The U.N.'s nuclear watchdog agency, the IAEA, said again yesterday that Iran still refuses to come clean about its military nuclear program. Iran was also caught -- caught twice, not once, twice -- operating secret nuclear facilities in Natanz and Qom, facilities that inspectors didn't even know existed.... Iran has proven time and again that it cannot be trusted.

Iran's neighbors know that Iran will become even more aggressive and sponsor even more terrorism when its economy is unshackled and it's been given a clear path to the bomb. And many of these neighbors say they'll respond by racing to get nuclear weapons of their own. So this deal won't change Iran for the better; it will only change the Middle East for the worse. A deal that's supposed to prevent nuclear proliferation would instead spark a nuclear arms race in the most dangerous part of the planet. This deal won't be a farewell to arms. It would be a farewell to arms control. And the Middle East would soon be crisscrossed by nuclear tripwires. A region where small skirmishes can trigger big wars would turn into a nuclear tinderbox.

Ladies and gentlemen, history has placed us at a fateful crossroads. We must now choose between two paths. One path leads to a bad deal that will at best curtail Iran's nuclear ambitions for a while, but it will inexorably lead to a nuclear-armed Iran whose unbridled aggression will inevitably lead to war. The second path, however difficult, could lead to a much better deal, that would prevent a nuclear-armed Iran, a nuclearized Middle East and the horrific consequences of both to all of humanity.

Standing up to Iran is not easy. Standing up to dark and murderous regimes never is. With us today is Holocaust survivor and Nobel Prize winner Elie Wiesel. Elie, your life and work inspires to give meaning to the words, "never again.'' And I wish I could promise you, Elie, that the lessons of history have been learned. I can only urge the leaders of the world not to repeat the mistakes of the past. Not to sacrifice the future for the present; not to ignore aggression in the hopes of gaining an illusory peace. But I can guarantee you this, the days when the Jewish people remained passive in the face of genocidal enemies, those days are over.

We are no longer scattered among the nations, powerless to defend ourselves. We restored our sovereignty in our ancient home. And the soldiers who defend our home have boundless courage. For the first time in 100 generations, we, the Jewish people, can defend ourselves.

This is why -- this is why, as a prime minister of Israel, I can promise you one more thing: Even if Israel has to stand alone, Israel will stand. But I know that Israel does not stand alone. I know that America stands with Israel. I know that you stand with Israel. You stand with Israel, because you know that the story of Israel is not only the story of the Jewish people but of the human spirit that refuses again and again to succumb to history's horrors.